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29 August, 22:58

Which expression represents 81 decreased by an unknown number

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  1. 29 August, 23:09
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    Unknown number is x decreased by x means minus x means - x 81 decreased by x means 81-x
  2. 29 August, 23:17
    0
    Hi there!

    So, we have to write a expression.

    decrease means - and an unknown number is x.

    Therefore, the expression is 81-x
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